Collateral for a security interest recorded May 2, 2016 (Opus Bank).
Term ends Oct 27, 2034 · High confidence
20-year base term ends Sep 24, 2034
Held by Drum Workshop, Inc.
Filed Sep 24, 2014 as application 14/495,718 · Granted Mar 7, 2017
Base term plus 33 days of patent term adjustment (USPTO delay)
Today
2014
2034
Clock starts
Sep 24, 2014
Sep 24, 2014
Term ends
Oct 27, 2034
Oct 27, 2034
Granted
Mar 7, 2017
Mar 7, 2017
base term
patent term adjustment
fee events
Updated Nov 14, 2026 · includes USPTO assignment & status data published Nov 14, 2026 and grant & fee data published Nov 10, 2026 (weekly) · how we know
33
Days of term adjustment
Read from the USPTO patent term adjustment record, not recalculated here.
None
Terminal disclaimer
No disclaimer on this record.
2 of 3
Maintenance fees paid
Three maintenance fees fall due, at 3.5, 7.5 and 11.5 years from grant. This counts the ones the record shows paid.
8
Family applications on record here
Applications sharing this one's continuity chain whose file history this site holds. The family may have others.
This patent's term runs 33 days past its 20-year base term on prosecution delay. 2 of 3 maintenance fees are paid so far. Confidence: High. from the record
How we calculated this date
One row per rule, each showing its own input and what it did to the date. A step we could not verify says so instead of resolving itself.
| Step | Input | Date after this step | Confidence |
|---|---|---|---|
| Base term, 20 years from filing | Clock starts Sep 24, 2014, when this application, 14/495,718, was filed | Sep 24, 2034 | High confidence |
| Continuity chain | Every parent in the chain resolved | no change | High confidence |
| Patent term adjustment | +33 days, USPTO patent term adjustment record | Oct 27, 2034 | High confidence |
| Terminal disclaimer cap | None on record | no cap applied | High confidence |
| Patent term extension | None on file | no change | High confidence |
| Fee events | 2 of 3 maintenance fees paid | In force | High confidence |
| Computed term end | The steps above, in order | Oct 27, 2034 | High confidence |
This family
| US 9,589,546 | this patent Oct 2034 | Oct 2034 |
| Application PCT/US2014/057383 | PCT application no patent term | no patent term |
| US 9,640,154 | In force Jan 2036 | Jan 2036 |
| US 9,472,174 | In force Sep 2034 | Sep 2034 |
| US 9,928,815 | In force Sep 2034 | Sep 2034 |
| US 10,832,642 | In force Jan 2035 | Jan 2035 |
| US 10,152,955 | In force Jan 2036 | Jan 2036 |
| US 10,825,430 | In force Sep 2034 | Sep 2034 |
The applications whose file history this site holds. The family may have others.
Assignments
Assignment documents as recorded at the USPTO, oldest first, with the reel and frame each was recorded at. A recorded assignment is a filed document, not a statement of current ownership, and the absence of a later one is not evidence that the last one still stands.
| Recorded | Assignor | Assignee | Conveyance |
|---|---|---|---|
| Sep 24, 2014 Reel 33811, frame 29 | Sikra, Richard A | Drum Workshop, Inc. | Assignment of Assignor's Interest |
| Mar 11, 2015 Reel 35187, frame 365 | Drum Workshop, Inc. | Bank Of America, N.a. | Security Interest |
| Apr 17, 2015 Reel 35453, frame 759 | Drum Workshop, Inc. | Bank Of America, N.a. | Corrective Assignment to Correct the Incorrect Patent Applcation No. 14/495715 Previously Recorded at Reel: 035187 Frame: 0365. Assignor(S) Hereby Confirms the Security Interest. |
| Dec 2, 2015 Reel 37195, frame 605 | Drum Workshop, Inc. (as Grantor) | Endeavour Structured Equity and Mezzanine Fund I, L.P. (as Lead Purchaser) | Security Interest |
| Apr 26, 2016 Reel 38527, frame 968 | Endeavour Structured Equity and Mezzanine Fund I, L.P. | Drum Workshop, Inc. | Release of Security Interest |
| May 2, 2016 Reel 38589, frame 666 | Drum Workshop, Inc. | Opus Bank | Security Interest |
| May 5, 2017 Reel 42409, frame 38 | Bank Of America, N.a. | Drum Workshop, Inc. | Release of Security Interest |
Sources
Google Patents · The patent document at USPTO · Assignment records at USPTO
USPTO account required: This application in Patent Center · USPTO's maintenance fee lookup
Maintenance fee events come from USPTO's own fee records. Its fee lookup asks for the patent number and the application number.
Free plan: 3 watched companies. Pro: unlimited.
Alerts on its grants, lapses and transfers.
What's changing
Oct 2034
Term ends Oct 27, 2034. Maintenance fees still fall due before then
Note
The 33 days of patent term adjustment (USPTO delay) are read from the USPTO record, not recalculated by us
Citations
23
later US patents cite this one
That is top 25% of utility patents granted in 2017 in our data, the only group it is compared against.
How we rank
Every date shows its work: the base term, any term adjustment or extension, any disclaimer cap, and the maintenance fee record, each with a confidence tier. How this record was built
Computed patent terms end on the dates shown. Related patents and pending applications may cover overlapping subject matter.
In force means the term is running and no lapse is on record. It is not a finding that the patent is valid.